Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70a930177f6e22d77b2052d905aeb3958974dd1ec14d741490a042d4932f2d43' 
  AND token = 'eeJBguihj6fa9vhZhabdvVQ3NKffJarF3ieQcQTkDiI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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