Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bca23cb9a841abcac171261c4e7470583cc31ee5ccc4bacd372a8a9fb471077e' 
  AND token = '3sU475HYJwqdEaCRmqGGLCBxqf/vQ5oHR1Z3vLEIqOo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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