Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a96c69fdc354da2ac8cd4acd408a398697a29c888f12be313c4806eda38e3559' 
  AND token = 'Nfj4uQfRRDHDjUZ5lxzu28T158NEaKXgWbzhtbZKz5U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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