Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd639ee64415e57de8f26cc7622edf63e8e3dfb8ee884616736b2618fd6e5a5c9' 
  AND token = 'RLnVX6rBR204l7gyCIjz+ryP+lzcNRzl0hej68TUE1U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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