Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45821bc0bbee33ff917ee86cd443f275fe77e7fd15862960b5e32adebb3ba3cf' 
  AND token = 'SYSmwsVo6IuIKCBRVqqzsf62ybT+vWUJWO3uZnsft24=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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