Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b89e88178f662318177c5ca7d98d093f8f536cb0cab22c7bc1cef886f643b9a1' 
  AND token = 's9Yj15jOpJXMWgNgFG3L64SyH789HWaPMetKNZilPXM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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