Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd30ca7ec00de88a2cbfb3aa1327563e13582af25306b21614b5b863342879d7' 
  AND token = 'iSVtPCDG0HONwiHGxrda459DpCycvHFXJvgK4MftTRc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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