Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '883859cfc09fa1d3ffbe99591e4348abcf5cab0067fc0170eefd6f8c3aa6e6a0' 
  AND token = 'VjBs1EF25XtZazmC59Y60ZLGTh4Dxo//PYVpA8SzR7Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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