Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58ecfb7bdf63601d6e6ff7e27d1b97328910646465cec4a3fe68a0adba8eee79' 
  AND token = 'C+RrD9A40XWJpnN32DDxwxE4B1whN+FkVvuYoYEdVl0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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