Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7a79c2a072e84b8a5d9a26ad48aca182096a224a323d0bec604d109d66784689' 
  AND token = 'UECj/p5XKNvUVohxqtglByYaguPBMqQogQcm48WqFRk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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