Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '693840a066db1041ddda6cd224cc9936b5200e4ef766c7a689a8c2699efb6265' 
  AND token = 'MDu9pQIMoFd48pds4caDqqjXtWfQHj79phRJqdzu1kw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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