Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f354298a10aeb4fbe60b660a847502bc7f402685190a07ea816543eb17c503c1' 
  AND token = 'UJn5Sg13pcp44vTnyrA1+OL3M98V1itgnxWeUWINY+I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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