Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6581a79ea441f7965402c7cf4f35b06ff2cf23472096b54f042b80f98d66eb3f' 
  AND token = 'cO/kcr3PJvY3aIq/Oz6+0U0MvpfPgcUPmQeKlEoFC0Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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