Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd411715768ba0dc465670a36fbe69cc0b788bdd2e538afdbbb92d21431cd3c23' 
  AND token = 'i0pGErRmKlDSrmLKkv3DhqK4QOak07Qo3O1IZ6mm+S4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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