Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0740c715c0f11158ccfb4eb145f731df3f2fa8f8f8d972a12b128314b9d07858' 
  AND token = 'jkTv1iNYevBQ04DmHjSuwYJcAQ44sRg9OQj1oXliFaI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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