Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa44b2d2ba700c122849c89c4fd14d2cea3d88d43ce89047aa582263a626ab7e' 
  AND token = 'C60lsjFqN+dXispdyRviAUWpB5XMhO/eTcyzWujE+Fc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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