Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dfe08a42b8833d521eb93533763b6f83ae7cadf12702b07d56dead040a8e405c' 
  AND token = 'A/eDXKJLergcdqd2xKMDUM2FbQqLFc2GVC6E+dlDfcg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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