Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a126238b6b6b3c09415f843decba423466952b414897ec1c0e9823fed8e66ab' 
  AND token = '/Vq7gqEhSYrHJNAZee0mphQt6mcJ9rmOV6Nh0V1qzvg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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