SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7a1d8a326d191d16257900f30f48da2930cd71b98dc65c85b6155766ea7f0a10' 
  AND token = 'XEoyPx84OLhXgqkuK2gpYBukVA4MCufmvJlb7AdYuHk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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