Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8bcdfd1602d70901852f9861527c1adb5bea14d06e0370b6c37becaac8ab06f6' 
  AND token = 'wy0zaH+uodVWxC8ex6eVr7dLw7f8Wri/1Q5I6lNaWJQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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