Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd7abb80657c997a4d0000483b94867354bdd2949abb4066e5c64ad87a7c23148' 
  AND token = 'bQe3cnn2pvglFHXqVIJgO9tCUMbAwFlrcwN4RKCC8Ro=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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