Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'df0ba47f126cda396cd8b44e09cc02ccdae91812af8ff96178f80a7ad94f710b' 
  AND token = 'SfK2LG84Jf6GO7pzNqNqJs6l677BGFor+1+FLBDZEyM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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