Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c5d93a59a9001e370128a305f6410b083fdf7f0778a605277f4114fe679eb6ec' 
  AND token = 'LsEqZf+iJFOVAyV7SQhPqkTqofvkFELEDo/WbO+AtIc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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