Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0494347c447d032b3114be842e519ba81d6cacfb6255bf133304ca97b48e674d' 
  AND token = '/P6wc6DE6AV/ELYnS3kE3OCvPA+XSceqsaDE9ALS7T8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}