Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '92703ad6cbb848c61ed9d3e85a360b8577260bbe00abfd6e0c19d8a8d94bd354' 
  AND token = '+A/YqZRmlZ0Csk5ICHVdFgSzJemS23+Et9kimbwWxhk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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