Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eccd6906368b7004a0cdda5644dc5a931440d5aa8381ee7a001d0889f589db0d' 
  AND token = 'f63mcUmB527RmdBvjXvbs2xjHfQUCba9ybp/1tEJhjg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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