Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25024278ee32d603c0cf19ef1e863eb24a7cfc2c9de7c08bdaba0ac00790da2f' 
  AND token = 'rJZk6MCBByxu7nF/AjmBlcZeSpGrl+iyjIoQEWGd/b8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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