Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f39c3358dcf912be6779c58f72f5b5c15b20a88a7f12dbcb142fc95ab1b30233' 
  AND token = 'nI/808ezUMXVnTLqvVGRRI9Q2YnijyScPOP4Ql3or4M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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