Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36a282cbc69cacb7829aaed834501748b76f60d628e307cf7c03d7d67165c576' 
  AND token = 'kCB/cINSUIMgMRuhdtCJvMRASgoi4yp6vlaYwSAVl3Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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