Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f74cac22b2cc5bf313341fa5c51ff1189019b25d54b1099d90dd3719578fa77b' 
  AND token = 'YoYS36sIB/ITdGjnRQ9mk8s3RBFzqdz264NL8NHcpGc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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