Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1edad31cbd1be5496bd3cafcb9c229b1d8b0efa4d9c30e6a17b5c106c51c67e9' 
  AND token = 'n5QRhpetD2eMiVBDfZs+089EaZ9NeYXO7qZeDeMdNXs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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