SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '30afda659026ff2480bd9195482ecc59b4fb8237855e0554b19d7b59f3881f05' 
  AND token = 'zvewgsjmmbWOWNPQFARfxw0wr5k9JB5gbr0GaVhCDuA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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