Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9fb8d1845bf2da1a9051f9fa1dc2d018a0b59a5a762f22654a92e1d42f20f8c2' 
  AND token = 'eaosS6iSjcdHxEvrZIq9KSJNcxkySjwJYp/diwEE9yA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00064

JSON explain

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