SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '09e40909baaefad2520e5b74925cfee1d941793c499df0e18b39ed6462258b57' 
  AND token = 'N3CV6SJkLERPfTKx7A25PoS7m+WaK6GBZvOhBin7qps=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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