Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7212094c6c9ca92863d3c4d6d4675a78759d53b84dfc4aee58111aa8567394dc' 
  AND token = 'RC8h/wSy29GncyDn56yhIQaEYGbE8FAPnSJUWpeV/ds=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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