Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c3ae4d411b04b48812faa637b2bd7112877a397acc84321e1a6c9af77dd99692' 
  AND token = 'aWdYPcZJ702db3JI6XAvtzJVUoAtVcQGPV+uJYKsFWY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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