Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67cf104e5f3a66b1484a8051cfef309996e855d60477d9a6e1831b04092823a4' 
  AND token = 'vLwsaabjx8hcz9+p52DQSOidKvHUG618Vz6+n9UOyf4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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