Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b986c252be03c47da23d67c028740c87910e513021e32ba4c8c2f312499d813' 
  AND token = 'xcaXTQYH7fDG4VhZJ0bpU2FSac07/Xvb8xSbF/ZgMxk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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