Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02911b31fa174b8e43d3077496b11e2310f96acc97ae88423c7b94e5873e09e9' 
  AND token = 'Q7fMmJMyaQChF2Y2agSp9vHSsInyi8WqvHLmpqqx3WI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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