SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'bd8e9c3860628b32b53b2400cc3beb03e5c47ea9b7244848a4339f716f3158a9' 
  AND token = 'BTAMq8icqPKhWkF6JprRYZD7kmKJREVg043HOur4YAI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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