SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'f7e4b8720022a188551fa14ae771ecb69a2292fa30d1b5d9a9131246c1f8fbc0' 
  AND token = 'EpqfpZc5khSJLkHFrk2PavgRULvF4HHn3zOZWKcGehg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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