Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '286ae5ba93244804a64c483651bf838b2761e7e299766c145b079ae15647bb1d' 
  AND token = 'qO7ZEO7ljoZDdoWvhT945QSaTeQH00hIKzGfuhUFPpA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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