Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '47f21f4fc1cd9729b7a8776cefab00adbf371dedf0648bbcef0d4b40d7864738' 
  AND token = 'DJYNNDmotgieiTId9FaRbbnEXHnrSb1UeZUjeJtMg7Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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