Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e302654b1091dc20ea40caba18424df50125bd8128cfde3891a1fc159ab1e14' 
  AND token = 'hb8FzLE4n6JW/tydzjdxJk1jHPJ8f8eKL6z6L3iLjZc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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