Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4385debc4a1b8a5d551edeb90231750b4597dbf115362093608e2b70bb4cc85f' 
  AND token = 'uYPfg1+6NFfGd40LTwYYS0q220jV8JEkG1DeK9op6eg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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