Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8017f56e50379b3d3fff567dd3b5959a998174ea60f41e833c30e18766da6011' 
  AND token = 'JEvfkS/2AX6ROzgo+piAj2dksc40wDMFFOSK00ivpdo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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