SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '7097b496ad329159e9dc42ddd2f526bee6133e71c9c7659d78dde8cc289b146b' 
  AND token = 'F22XzfGhGDbFpI4nlGqI8BKFbBUYN1ywvZahPy3oLmw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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