Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a73a2c0d4d495205415355ea30cd4b7c79f67412a4536baabb71a751e47836f5' 
  AND token = 'jG5GcZWGFqQ5dXtJwTDbkX8azJiP01rVsI9Xzd32Yl4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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