Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2244ea8fba7e42497f5ff42150136236cc7bf642b6dbf2541e5b4feb1fcc5110' 
  AND token = 'rLy2ZRft5saKAIeRozmn3hM7b2gkSZawu+CoiSlWW5M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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