Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f522b4ac9c2af1bb39275a76b726700618a343caaad7cd7481f33a3acdf99d8' 
  AND token = 'J016gxH87dovEghW7i0AUfAq/URq+atTuVG614cYQfg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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