Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a9c7a41075de437b52e77881375235751f8cc4c78e4b8860617dcdbd01bbb8a' 
  AND token = 'UIDMkfKpGmnsiT0sDA19AxuxwPudWPZgKwcG5XI8Uyw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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