Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '168ea0d57b19824157c0c4bb7912995b005638090138422bd0324d624316bf1e' 
  AND token = 'oeo7WALlQocaHStgM89+MHhUn2qogMSN9io4ooVT5vI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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