Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a29fe2251b6ffdf76f70f8cd31fea5df18dff45b14f58b045f854878430d19b7' 
  AND token = 'lC9l88H4XnTE5IT59qCSqociNvbN088n3W+OKoMMyT4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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