SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd383b5a28544c03da96ce51316b338e1d23baa625b501e7bf28ab15fd3cfd92e' 
  AND token = 'Fvkyacb4QLJup4SosaqCBGliUFOGgJOoN6YXUZhxfl8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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