Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c1361f99369063a7112e99877625cca86d0f3a36aa66fe0dee41dcaaed726457' 
  AND token = 'E3nGMhdp/8EEFhdCSeXwXfkkfb1tcsLsSMFumMrWenw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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