Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09d56d789bff5d9d27c9cdb3ba0eed53d5e7f07291d433ccad77360471da258b' 
  AND token = 'Glon0+xUUpE8Ks1rTztyzqCz5lU7h3HZAcM8nj3+3iA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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