Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d387754d4a6d6673b64dbab55555d166c626f752c90d75678b82fe5bbe1d400' 
  AND token = 'CA+S40odDPOT1ZbmmUmktTjDHBDer4isiVDPMwaUf/0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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