Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c6eee4ca6033b26f58c35e1c3a786f0f8e81066964b9c40b08dd71692c4e0df' 
  AND token = 'i+4e1wViS9ii5UTGs49ZpsK3h64goWHTI4RAnRl1peE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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