Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '92707a391087c731e9173143ea4b87bf903faed7b5e0f800b73a0c84ef5ebd32' 
  AND token = 'RG4GnHnnv3Y/0hIA9hcY955eYnhE6bBVO1sbYU6m4Y8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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