Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a0c19f2c2b7347b4f94e827c44c4cb95ec7dce2595a75c19f4dbe9515ac0898' 
  AND token = 'bIMGAewxnB7rGFgbugbvrWmo2Ar3IXR6juDE8mTXX9Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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