Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '727c7c8dfb63286078e9e106ca6152c1dca0b593812551239f860ffce55c600b' 
  AND token = 'ZbeEzPp4jSeFN3GS13P1T4tbWruZts3a5mcArbILn5U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}