Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '977f52a9759d81c2d8a3c1510d151ec5660964b5e0f0264b314bde09b45ad5ef' 
  AND token = '54l3DFofPQ4hxp2fL1IyCGgk0TNOWNnSv6UHUcvj+CQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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