SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9cd2e88969bdd24c3bc7f7ca58531a8fb0d6c4370c5a83b202bfb82bc92d6f81' 
  AND token = '1ceSf29G5ly86t6DzjV0k38KTG8smgc3rR52Gd0b76g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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