Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f28679873b5be9dc73492cabbe567f154f7953dedba4a69ac8d6fde10d714d8c' 
  AND token = 'vTfYBuo1UxD3HAfbiaCviwluu/UazkYvWId3e6wqebM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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