Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '035866b57255eba783445288b6b804136d306528fe44992ed6152ff6263d8846' 
  AND token = 'mDWh9k7ZmlWg+XUfVG5j1sB6Z8Crt5euo1iNVNwz2Xk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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