Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ff49ad6a6729cedcf9b0d32517d0dbc8247b3bb793d5eb7df2846d29cb19907d' 
  AND token = '+5fi3wFDfuJBMVJhu7a5did8UYRMx6BDZmrxO7gwSEk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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