Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c745e97446b90e85381b7071bec7248aac4b174338bebdbb356d16553658a986' 
  AND token = 'ku5j5jMenTmiWmI5tedPmD46fSjvSddDh4shusb4yzc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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