Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '496302fdc4253ed0c22c778f1a0dfa91c15c6a41216ea433aa70d4114b2876be' 
  AND token = 'GgBlsVXV22+i7ANiKH48YEW7cyFrhf4H2twq1LEpYQI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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