Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '53df4ff5a6d08b42a39bdc5055520c6d92b9addb9d1134fd671397072fdaf00c' 
  AND token = 'Jh1UIQbCQR6bHgLHYiADtNGNMGVxLVkwUI/GJI652ik=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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