Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '78ed82c076398ee8c455b68687a6c72639b7586d6839081a869446a9d606ac88' 
  AND token = 'zQ/QxE8SVWTcgiJo9OlqkUG/p7pPQEvBPTbXen0+odk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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