SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63e3479c4ddc6cb1f6b8e68cd5572cc398e3f8e7901d9e21d17059fac67e5713' 
  AND token = 'kmZ+P/4SJlHYqZTZ/x2nnK4XmTqzPlVLxaBUpD/aqxc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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