Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ae432310ca726f819f25962d427256e7b30b08bfd92fa0c84c1ee953ba1f8e2' 
  AND token = 'V02873YWb/Sf5QxmZJh2xzgSuXDSOCKo5o7JOKwat3g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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