Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8d98e8bdf8491aef24d087a400e2d8e495362313f825055971d5c5c82b08d021' 
  AND token = 'XOKoOhUth5E8FiExtE2PQzWk57Cs2wMxIFXvbscdoiU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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