Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '04ca9e5cb6b6303ddf724c6774a7045eb46ee0219ae620f3a6fde69dc3c1d8f8' 
  AND token = 'DGqE2TRQApdMUwDjGvBUmxpEPileCjra1yg1edqdwMM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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