Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b19f88ada24d36c99209f8db71d08664afbb7ee3b1bb88dc20a3098ac7ee57c' 
  AND token = 'oXpaSJL6o+EJfdiBP5oc19lPxo5dVcSTDhz2kNs71Ks=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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