Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5de9efb8e353e8d98d0e4ef821944681e57b0d34fb7384a0dcae1a8455e68aa9' 
  AND token = '0KPq+pNApv1E4ypnt0TPeRnzYrBp+J0U1NVstcb47so=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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