Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b88f7ad2267ab0e3c8d2e648e166a191f9ffa1dd5ecfeec10f78877875c5a58' 
  AND token = 'pycfVJK5rRFSyQnPZIkmKrrC7W7zJc28o2Shf9Ivilw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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