Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '24493b8cf2b2a6d4f3093799065d8a7c6ffc0712c8a5ac3e6e55907168825096' 
  AND token = '4k4ma0bRq7X/c6siKADcaxbYVMq5Ok0QELVQ2hXuRY4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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