Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9801d4315a5a8c0ac132327acaacfc92c1dc90f7eeb4c9b400f40ef272ef669a' 
  AND token = 'Ezc94vssl1zMTguMvYR5Wq/Zk5TOElY0Zgbx0cjnAIk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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