Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '913208c559ed9a5bf745a9c976e4a52979ab90799b248f1f1c6a26e269a1b0bf' 
  AND token = '6SDrEY+FJcgHv2p1rzmacAya2S+Eeh2ldOg/FmbafiU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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