Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'adb8bfd4bb278a9fc6c65c4d7869ee6a560f10ac395218dd22ae08ff0081c64d' 
  AND token = 'SOcF52jplOhCLyUW8EBBxIuqhU9fdqPc5pv3cHFD17k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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