Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1fad23ff11a39137cfd778bb731472b17cac05c49e1576f13547176b451c6d41' 
  AND token = '998lcRXMUrhNh2QQ6wkwE9u0yY32Z/L0uPfrxguFqic=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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