At 50 MHz clock, roughly one clock cycle for address decode, data access, and capture.
The CY7C09349A-12AC is marked obsolete. No last-time-buy window remains; the part is available only through the surplus and broker channel. There is no official Cypress successor for this order code, so a pin-compatible drop-in replacement from the manufacturer is not listed. If you are designing in a dual-port SRAM today, you would look at newer synchronous dual-port families from Cypress (now Infineon) or others, but those will differ in supply voltage and package.