SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05d91094ada5ca345eb9204e0fd5934a6743f25b39cb63df5776441b48f40b7d' 
  AND token = 'bgUgYwFETouCQ8mOGdY5qV9hY/jZSXdc6+xdLgJmo5M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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