Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '569817eb5b6f5d7941deb072d5e4073dbe79408c5eeceb8c1a36b418dd6982bd' 
  AND token = 'A7gES2wQ03u0BjPOvhKgaCT3dk4LMvSl7e9KBTHhxpc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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