Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4abe28596ac9eeb893f6f0c284d2232de168ece4e39a39c8d04b97c6e8f86bc0' 
  AND token = 'D8b8kbM2ticn305ODFy9eKkNP0oPBn6KiCydFS5wcig=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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