Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c53799563e8549435ac194c36b9c697bfa7b33a9a662a5b7595dadd37b8a4946' 
  AND token = 'fUJO9T19zlFThzW0/GZyLuo/Cyi1NTKEjM0Kc7vzOoc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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