Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2732bb83ba8d0831094d672782a71e815e26995e8a570bd5f4552b5f689a40a1' 
  AND token = 'q4I6h/xWqFaYjJqE/GJdffcES8BykqcQ+9uZ2PlW5cc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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