Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fc03d389e257acdbfa5f103350eb2009371eb19cdde44ecf8a13057bfc8e9a8c' 
  AND token = 'gB8on/JKhEi0lvi/6dKgvZQMsxE3D4H6vN8MN8IVFHI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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