Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '66308005bb526ddb232c587207834714c88456730504e6274e4ca76fd4b6d4f2' 
  AND token = 'jcuaW1EVMadwmM6wl3gCrR8VFVVVk4hWOT3AUCWaZ1s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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