Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '14985a8888a834b841d28a477212a5b254e87b42fc6de80ef4de77718feb1db5' 
  AND token = 'bDAJ1Sao9vAVtUBpNqIUqzbc9BoUQFGxNzB5rQLJKTE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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