Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '19e6a87682fb7f511256252c91abb2ac25357b439e3bc5b5d872ba62615c3988' 
  AND token = 'cgNG2HMhxEAu9MrgkA3l8qETGbRKS8RfnE5yJG0y6LI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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