Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c5dd64eb02580dae1409d8c6c5b3eba53b580af46a1c9286b9af96e557d952f4' 
  AND token = 'RTy1BrjxK0yN/Bmths9Y5gwS37LzcQewMwxfrXcWpLA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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