Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14dd48b2156e53a261dd22747b7c56a0c60172b178a98f29b127a0e08024c6b8' 
  AND token = 'V+5vNL0t38JbBaG6rd2QXpMrzGL4SlkIAti+p/2N4JM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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