Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '0b0c929900037ba7a4637b4f1afc9c9080ec694133a35d481be7ae3253ede773' 
  AND token = 'iKJyYo7vMcOMt73EtZXOWLUyR84QgBiOKX+ronOydFE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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