Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b0f4d2eb46d0c7eaf5fa9e3a145c5ec23d6341c8063eb643f5101836309ec27' 
  AND token = 'KtJGU3QH0miXT0n9e5tGswkxTWkxvsnvjg45+A+VTEQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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