Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '157a1f3241c65ac009ba6485413a072a52ed46c6139dcb60d6bc91ac3839107d' 
  AND token = 'Dkf4QQJTbS2iTfa4+gQM1P7t6ftOOpEVMpEglxfnJ10=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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