Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8f375347d97ca4e1a539b481cc1a99a8ec6942d529a21ccdf8b2a9dd51b0996a' 
  AND token = 'Q7c4CsD3kW/f1RmtBywOsGn6eUww1yxHL7ux3chTsxs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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