Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e7d2c758c93513de2547756d78c314333861fdbbd6444f46b4266c1b4a01440' 
  AND token = 'scoX/i/3dHmz84JD4iMJhYpv3IwBg2TcXKFiwpf5mwM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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