Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f5ee1ed590674157f0e60a1a37d144c453feb53d8141cd754f6ebe43ba245fea' 
  AND token = 'fUjGw6PPiluLl/SbuH102CjM/WOtppJbbnDdBiEq74o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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