Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7f8267186fa927dc391976064579d9c48f039d50f3b6652cee84d7e19db30856' 
  AND token = 'EnAR6VIAtdtYq3sKja8CsMTd4e3OSjd2mXpdQpLT5Gw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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