Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7f55d13a301153bd33be08a34062ee1d380e8d62baf3389e5b8f7f63bade3bc6' 
  AND token = 'azyZCvhOBX8RtQI3V9qaTqBzbyJhaObjngbyjp2S1wU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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