Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2815619e555ea8491ef6bb9296c3bf345d7f68a0c99127e5f8ed318ba438bfbf' 
  AND token = 'UllIo7k/fjtRbb4zPE/EmZ22Ur/EtrBFhRJvm866pWQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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