Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e32056e76280a6f6fd6e63709cb1b7f9c08923be5196dcd6f8ac3628b18925e8' 
  AND token = '155orArRLZ8y4mGp45nwSldY2oL1n9Ysab7rLLquo0U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}