Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '811481dc06240d4de5871a1a72e0e63bdf6be6bd17e479394de15454d925baa2' 
  AND token = 'rInYd2vpHultb6DXlzzhr3ML5lQIvj49T6mHpfnGgoQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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