Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '47676e13b7928e9bc7addc55c1496eae3262940b1ca1cc99bdae96492293a90d' 
  AND token = 'SieoayM7iplueNkTQsdfr8wm3j3zJcZisvJHW4F7Tuk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}