Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f64ae9ea02a9fb636ff90adf34239f939b436ef20ff759c5c108da0e3cba04a' 
  AND token = 't8ihHI5tNyX+Je99aGdGlLp0M+7r20ZfHqk9Gwiengw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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