Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ff705661930eb2dec57df2286f7459e6966d72f20e198b566c0c501820601566' 
  AND token = 'QDuW0ThtlMCP+IvTsTrrJQzTGhQpGlcMmujEc01R7ss=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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