Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c93ace9f9ec7f08432a875fdf713aa123179dce96cb4d6c8013dd11448cb59ca' 
  AND token = 'tYiOqo1HhCOdgJF7q2IqAFQqSY56a2jjXjD58QxN/5g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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