Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd8f45e7a980624055c758b69aa93a4b062ef900c5387d03d3e4e7ac3356fe4cb' 
  AND token = 'YlvOabBXL3EfSZ+6OnoJvXx3piye+k/fnsOlk5GPxfk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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