Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f90300ed123affd60d4b05787de4ec5f7288391b7ae64c43ef4ab510ed991b6' 
  AND token = 'oOBKDECVssvY7XhQaw3lUTuuHsSdD26rxJRFBtfe9aQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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