SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba1119c94c5295fb431051a250d0683a2fbd2f2342ea66ba31195f5439e42b9f' 
  AND token = 'Ure0Xl/zrYl6gQSaVuUcCfpPAu6RLXJzngIFsKZjjf8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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