Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8173d967c7281172eacc68fdf7aca5e1298996996ab97e7dd6cfb288388190e8' 
  AND token = 'zfLQ+lMLiMdZZxik+DjsucrtIq9MtHMdlCayuUAVlio=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}