Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c98f48746b2260de4680a1adb928b11907f8ce5a9bd2c56504b1949881e4ae12' 
  AND token = 'iG8K5vwuXOILu/0LHOZN5X9/4NVuENTTZXoAQ7wwu5w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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