SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '894bfd89587da86fa956f434298bb938eb17a39383134f9b88e9032965450072' 
  AND token = '9ysrOjlYVRZGOErz+uvalQAeqK7l+JS0Cuut84NprpU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00135

JSON explain

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