Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83bf1af3abfac54a50bcc694bc434bf31481d3fe3fa22b541cd41d893fb52611' 
  AND token = '/1jUoC2Z5nIJNi6CMinU0b9JDOaL0LdwIMGPBiOKqqQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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