Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c8ec3fb068b90c26cf64c0cba625f66b2659b0907f401b75d1fdb2c2f7bdd921' 
  AND token = 'wbFwunvMm59swil5xaXUO46bncTlijmDlbg2ukFty/0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}