Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9ac36529b38b33eaac5391faa88a5e6a14bc618901026a14841d81ecc7f71ab1' 
  AND token = 'BXi9SFPj82Kf0jTfTH5LTaaoaFGzIN3i5CrhkqjQ19w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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