Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22d1c68f6370d0bf58e73cb8d27a1e995c34c63ba6bbb1229f31ac26c36bbef9' 
  AND token = 'uM/Ur4cdZvL+uQwFtRkQeQYg3TbJRv9+7/qIJAQxsNQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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