Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a4953308ebcce91e46c439a48eca12ca13f161ac9e19abac7a6a7293007bdb00' 
  AND token = 'fykL064DkPjaoWv0x0RpBe5DirmF4G+1p/HXeLmENGM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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