SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8582f63e53506720d668d93c5f4b4117f7a01ab161a14755af5fc98eaec7e51a' 
  AND token = 'p3CsfGr9ziMwlMMHpJUbd+qXhLfLAZB/psLJ0BUraW8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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