Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '24c11395c0f5e76a04ff86d60148331a89dafab416aaba9adf76cf924e60f536' 
  AND token = '/vpz9UzO+ENgHLLkpz+qdwG7ERetJ0EhE30UXsfUfjE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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