Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd26f4343ab64c7c8b2bae8ce65730c44817aee2ba8d46fc19e035b5f36540638' 
  AND token = 'oMQ9eutAic4s2KE79TyutXwUuU928E1xo9nAHzcusR8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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