Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c77e9c620f71896a8cae04d4defdfe432fed626935984d38c0e4af9d2bb083ff' 
  AND token = 'euklnt+oUaFgGBNBEpRaRsdv5Bj2xx+u5ig1Zs3XgjE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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