Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e017e8b4ec72fd1d28af0634289c565159011a7b174dbbc1d2971962a9b510d' 
  AND token = '/V01xxNGHqe7ATYRZ8mwjg6ftwWRXtc1Rd/kyabF2m8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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