SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c0f25aeef779e8eabf1e63cf741528dd35a4b7591fc934afa783fd19d3af5da6' 
  AND token = 'wlVhsM+ZEwhSunv23PXEUFmQ1V5UBg7sT3MYzH22Hbk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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