Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a13eab4f37dab096e4059378c84f3f31e6793663de4c8726f636934ee61a64a' 
  AND token = 'KUqMw+KzbxhQE6JaDWDt5AxHfPLhAW/LQJ5E55OjKJs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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