Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e36706fd9e3af9044f86720c371cf50c2a004e44ae199873aec8fbd71accb20' 
  AND token = 'O+8pOCXjEfpXKkDxgXGuZSe0O6ZBVWRkRdU//MWYNkM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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