Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3f2f1334f9a39c16a573f8fec9e829fc7afc12101a6372735e6674e537763b7b' 
  AND token = 'WeNMI2O8fVaS/hdVlfBw0Ze471M9t8Xy5H2QJayBj7s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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