Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd8279bb4bcf45d2587f3372bec79e65017ffd8faf507a52b97928340c32a6deb' 
  AND token = '8YfT/Ld8hqr1o63Oz5D+V4prpoWdAg7pzSxYEplKk+Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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