Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4abe1a3b9eeb4d30a66355e39540e7cf4ddfbc7e54f719eeb9e33d1b1bcc4ac' 
  AND token = 'G90D7h4J7NHgpIDN4DZKTuuJvRx3zQIv92oH+mcUuW4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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