Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e2ae2dafe0dd7557bd40788fe94b9109ef343afdc17daedcbde476ca85254f1' 
  AND token = 'AKu1LcfOhHKNp0CoGZuK/6kuesoA4A2+yLVwuT14lt8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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