Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82555c06a236f90c9876f39538e57c7dd02017b78ada74bebcabfddc1f6c7abe' 
  AND token = 'd4KRd5dXVuOV9KYH7F4LZEWzDcm76G0FTyjhgZunkhY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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