Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b715e26e3f795a7199da171afdfa813d6ee787a1f697ee0a6e651d7966001fe' 
  AND token = 'O677h1V8wwQJtdpZumdoDHHObY4RIZpU8IzP0zSSgxw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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