Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58856631b8b013437913d68643e323cba34a50c3b560053bb6179f59e016acbf' 
  AND token = 'o5/zcNYoG69W2XtPhSsxacHH7F2Yv1YbXhwejPiIMyM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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