Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d9a206e48aaa803de929a0098f3cd64417beb7945bc631f781c3cab7478660f' 
  AND token = '1XD7qenJtvt4NOjMhq12kUvTol3+SFoiOI8xP8pGNf0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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