Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc906133df351c1aad65d28679a485a31b642b207943a60bfa84294c1a730ab5' 
  AND token = '5QwuHyiCV1ZF30e7OtE3o04ToSX4oulDg+rnJS742Kg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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