Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b6697eab532c5f700609a7a4017d4cadacfd9bbfcdfec00615e39a343f0b574' 
  AND token = 'SxG+aWHW0+ymW73M2tNT5OtR4NTlO7HxBvnatj2nuPo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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