Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d775c050d44ab5d3d6bb21800843de8849181c1b53883694f71182e27c36fe3' 
  AND token = 'jZANvQtf3kM8WxzdKdhP2S/xxHOTw2Y9/4wNaBcE4EU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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