Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af39a9ebead016b0180b6f63d379008b84ceebc5d5fab9b6593306e38e952da0' 
  AND token = 'WntvLvT4Xh8KWf7gz2kiwiasRAldS6YwMF2A95LKtPc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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